PWM Duty Cycle Calculator
Calculate the average output voltage and power delivery of a PWM signal given duty cycle and amplitude.
V
%
Ω
Average Voltage
9.00 V
Average Power10.80 W
Peak Current1.200 A
Average Voltage vs PWM Amplitude
PWM Duty Cycle
Formulas
V_avg = V_amplitude x D
P_avg = V^2 x D / R
Where D is the duty cycle (0 to 1). PWM is used for motor speed control, LED dimming, and switching power supplies.
Example Calculation
12 V PWM at 75% duty cycle driving a 10 ohm load.
- 01D = 75 / 100 = 0.75
- 02V_avg = 12 x 0.75 = 9 V
- 03P_avg = 144 x 0.75 / 10 = 10.8 W
- 04Peak current = 12 / 10 = 1.2 A
Frequently Asked Questions
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